Today is the cultural festival and everybody is doing their part.  Masaki is practicing hard as her role as the mouse in Cinderella to impress Shun.
Wh-What are you doing in the girls' bathroom?
¿Qu-qué haces en el baño de chicas?
¿Qu-qué haces en el aseo de chicas?
O-O que você está fazendo no banheiro feminino?